US7641138B1

US7641138B1 - Auxiliary unit of paper shredder cutting tools

Info

Publication number: US7641138B1
Application number: US12/082,868
Authority: US
Inventors: Emily Lo
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-14
Filing date: 2008-04-14
Publication date: 2010-01-05
Anticipated expiration: 2028-04-14

Abstract

An auxiliary unit of paper shredder cutting tools is installed on cutting tools of a paper shredder. The auxiliary unit is formed by two L-shape plates located between two neighboring blades, an arc-shape hole at an end of each L-shape plate is hooked on a cutting bar of the cutting tool, and a through-hole of each L-shape plate provides for a support rod to be transfixed, so as to stably fix paper guides, the cutting bars and the blades. Therefore, the paper guides, the cutting bars and the blades can be prevented from getting loose or stretched open to damage the paper shredder or result in noise or even an imperfect shredding effect.

Description

BACKGROUND OF THE INVENTION

a) Field of the Invention

The present invention relates to an auxiliary unit of paper shredder cutting tools, and more particularly to an auxiliary unit which is assembled by two L-shape plates and is installed in cutting tools of a paper shredder, to prevent paper guides, cutting bars and blades from getting loose or being stretched open, thereby avoiding the paper shredder to be damaged or result in noise or even an imperfect shredding effect when shredding paper.

b) Description of the Prior Art

An interior of a paper entrance of a conventional ordinary paper shredder is provided with two rows of cutting tools, with plastic paper guides being crossed over between neighboring blades, and arc-shape holes at bottom ends of the paper guides being hooked on long support rods. Heat will be generated by the paper shredder during a paper shredding process, and the paper guides, cutting bars and blades will be loosen or stretched open upon being heated, allowing the paper shredder to be damaged or to result in vibration noise or even an imperfect shredding effect.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide an auxiliary unit of paper shredder cutting tools, wherein the auxiliary unit, which is formed by locking two L-shape plates, provides for support rods of the cutting tools to transfix, with a hole at an end of the L-shape plate hooking a cutting bar of the cutting tool to stably fix a paper guide, the cutting bar and a blade, thereby preventing the paper shredder from being damaged, resulting in vibration noise or even an imperfect shredding effect due to that the paper guides, cutting bars and blades are loosen or stretched open when shredding paper.

To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of a part of structures of a paper shredder of the present invention.

FIG. 2 shows an exploded view of an auxiliary unit of a paper shredder of the present invention.

FIG. 3 shows a plan view of an auxiliary unit of a paper shredder of the present invention, after being assembled.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 1, an interior of a paper entrance at a top end of a paper shredder 100 of the present invention is provided with two rows of

cutting tools

10, 20. Each row of the

cutting tools

10, 20 is provided respectively with a plurality of

blades

101, 201, with

paper guides

102, 202 being crossed over between two neighboring

blades

101, 201, and an arc-shape hole 1021 at a bottom end of each of the

paper guides

102, 202 being hooked respectively on a

long support rod

103, 203.

Two

support rods

103, 203 of the

cutting tools

10, 20 are transfixed with an auxiliary unit 30, referring to FIGS. 2 and 3. The auxiliary unit 30 is formed by two L-

shape plates

31, 32 which are located between the neighboring

blades

101,201 respectively, at a middle portion of the cutters, and are reversed left-to-right with respect to each other. An end of each of the L-

shape plates

31, 32 is provided respectively with an arc-

shape hole

311, 321 which is hooked respectively on a

cutting bar

104, 204 of the cutting tool 10, 20 (as shown in FIG. 3). The two L-

shape plates

31, 32 are disposed respectively with through-

holes

312, 322 for transfixing with a respective one of the

support rods

103, 203 of the

cutting tools

10, 20, and a bottom of each of the L-

shape plates

31, 32 is provided with at least one screw-

hole

313, 323, such that when the two L-

shape plates

31, 32 are abutted, the L-

shape plates

31, 32 can be locked by transfixing screws 33 into the screw-

holes

313,323.

As will be apparent from the foregoing, the paper shredder 100 of the present invention is provided with the auxiliary unit 30 to hook the

cutting bars

104, 204 of the

cutting tools

10, 20, and the auxiliary unit 30 engages the

support rods

103, 203 to stably fix the

paper guides

102, 202, such that when shredding paper, the

paper guides

102, 202, the

cutting bars

104, 204 and the

blades

101, 201 will not get loose or stretched open easily, thereby preventing the paper shredder 100 from being damaged or resulting in noise or even an imperfect shredding effect.

It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. An auxiliary unit for a pair of paper shredder cutting tools which are positioned inside a paper entrance of a paper shredder and have interleaving blades alternatingly mounted on cutting bars with paper guides separating neighboring blades with an arc-shaped hole at a bottom end of each of the paper guides being hooked on one of two long support rods, comprising

two L-shape plates, with an inner surface of an end of each L-shape plate being provided with an arc-shape hole hooked one of the cutting bars of the cutting tool, and a through-hole on each L-shape plate being received onto one of the support rods, thereby transfixing said one of the support rods and said one of the cutting bars of the cutting tool;

wherein said two L-shape plates are mounted abutting and reversed left-to-right with respect to each other, and located between neighboring blades of said cutters at a middle portion thereof.

2. The auxiliary unit paper shredder cutting tools according to claim 1,

wherein each L-shape plate of the auxiliary unit of the cutting tool is provided with at least one screw-hole, such that when the two L-shape plates are abutted, the L-shape plates are locked by transfixing screws into the screw-holes.